A large seal stone

Here is a video on a large seal stone I have collected recently. It is carved from Kaoshan stone, a variety of Shoushan stones. In the past, seal stones of these size were normally carved into the seals of states or important official posts, like Emperor's seals or general's seals. Emperor Qianlong used to own thousands of such large seal stones carved from a variety of materials from Chicken blood stones to white jade.